31.
Ethanol is commercially produced through a particular species of :
A
Saccharomyces
B
Clostridium
C
Trichoderma
D
Aspergillus
Answer :
Saccharomyces
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32.
Trichoderma harzianum has proved a useful microorganism for
A
bioremediation of contaminated soils
B
reclamation of wastelands
C
gene transfer in higher plants
D
biological control of soil-borne plant pathogens
Answer :
biological control of soil-borne plant pathogens
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33.
Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?
A
Bacterial leaf blight of rice
B
Downy mildew of grapes
C
Loose smut of wheat
D
Black rust of wheat
Answer :
Downy mildew of grapes
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34.
Probiotics are
A
cancer inducing microbes
B
new kind of food allergens
C
live microbial food supplement
D
safe antibiotics
Answer :
live microbial food supplement
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35.
Yeast Saccharomyces cerevisiae is used in the industrial production of
A
citric acid
B
tetracycline
C
ethanol
D
butanol
Answer :
ethanol
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36.
Which one of the following is not a biofertilizer?
A
Agrobacterium
B
Rhizobium
C
Nostoc
D
Mycorrhiza
Answer :
Agrobacterium
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37.
Human insulin is being commercially produced from a transgenic species of
A
Escherichia
B
Mycobacterium
C
Rhizobium
D
Saccharomyces
Answer :
Escherichia
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38.
Which of the following is pair of bio-fertilizers?
A
Azolla and BGA
B
Nostoc and legumes
C
Rhizobium and grasses
D
Salmonella and E. coli
Answer :
Azolla and BGA
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39.
Which one of the following pairs is wrongly matched?
A
Alcohol - nitrogenase
B
Fruit juice - pectinase
C
Textile - amylase
D
Detergents - lipase
Answer :
Alcohol - nitrogenase
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40.
Which of the following statements about methanogens is not correct ?
A
They produce methane gas
B
They can be used to produce biogas
C
They are found in the rumen of cattle and their excreta
D
They grow aerobically and breakdown cellulose-rich food
Answer :
They grow aerobically and breakdown cellulose-rich food
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